The CDC estimates that two Omicron subvariants experts have been watching closely now account for more than 7 percent of New England COVID-19 cases. The BA.4 subvariant accounts for 4.4 percent of cases, while the BA.5 subvariant accounts for 2.8 percent, the public health agency estimates. Nationally, BA.4 accounts for 5.4 percent of cases, while BA.5 accounts for an estimated 7.6 percent, according to the CDC estimates. The subvariants BA.2.12.1 and BA.2 still account for many more cases both nationally and in New England. In New England, BA.2.12.1 accounts for 64.5 percent of cases and BA.2 accounts for 28.3 percent...